Inquiry about Setting of Concept HDL 16.6

Hi, everyone,

      There are some questions about  using Concept HDL 16.6.

      1. When I uprev an old  project, the Concept HDL  showed  "page forcereset all" to correct  the pages setting errors. But when I close the  dialog box, the software quit and I have no access to enter "page forcereset all".

      2. How  to set the directive      retain_existing_xnets_and_diffpairs 'ON' ?

      3. In15.X project,  the directive  TEXT_EDITOR  is in the section START_GLOBAL of .cpm file.  While in 16.6 it is in the section START_CONCEPTHDL. So after uprev a 15.X project , I use  the 16.6  to change the TEXT_EDITOR (Tools->Option->Text  Text Change ), but it does not work.  Is this A bug?

    Best regards